<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/">
<title>Tests the position and available-size of 'anchor-center' alignment with different insets.</title>
<style>
.container {
  width: 100px;
  height: 100px;
  border: solid 3px;
  position: relative;
  margin: 50px;
}

.anchor {
  anchor-name: --anchor;
  position: relative;
  width: 50px;
  height: 50px;
  left: 40px;
  top: 40px;
  background: lime;
}

.target {
  writing-mode: vertical-rl;
  position-anchor: --anchor;
  position: absolute;
  background: cyan;
  align-self: anchor-center;
  right: anchor(left);
  width: 20px;
}
/* used to test the available-size given to the element */
.target::after {
  color: transparent;
  content: 'a a a a a a a a a a a a a a a a a a';
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>

<body onload="checkLayout('.target')">

<!-- no insets -->
<div class="container">
  <div class="anchor"></div>
  <div class="target" data-expected-height="70" data-offset-y="30"></div>
</div>

<!-- single insets -->
<div class="container">
  <div class="anchor"></div>
  <div class="target" style="top: 20px;" data-expected-height="70" data-offset-y="30"></div>
</div>

<div class="container">
  <div class="anchor"></div>
  <div class="target" style="bottom: 20px;" data-expected-height="30" data-offset-y="50"></div>
</div>

<div class="container">
  <div class="anchor"></div>
  <div class="target" style="bottom: -20px;" data-expected-height="110" data-offset-y="10"></div>
</div>

<div class="container">
  <div class="anchor"></div>
  <div class="target" style="bottom: -100px;" data-expected-height="130" data-offset-y="0"></div>
</div>

<!-- both insets -->
<div class="container">
  <div class="anchor"></div>
  <div class="target" style="top: 10px; bottom: 20px;" data-expected-height="30" data-offset-y="50"></div>
</div>

<div class="container">
  <div class="anchor"></div>
  <div class="target" style="top: 10px; bottom: -20px;" data-expected-height="110" data-offset-y="10"></div>
</div>

<div class="container">
  <div class="anchor"></div>
  <div class="target" style="top: -10px; bottom: -50px;" data-expected-height="150" data-offset-y="-10"></div>
</div>
